exFAT-fs (loop1): failed to load upcase table (idx : 0x00010000, chksum : 0xece6545a, utbl_chksum : 0xe619d30d)
======================================================
WARNING: possible circular locking dependency detected
6.1.36-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.1/8282 is trying to acquire lock:
ffff0000d602ed48 (&mm->mmap_lock){++++}-{3:3}, at: __might_fault+0x9c/0x124 mm/memory.c:5654
but task is already holding lock:
ffff0000dd7c20e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_iterate+0x144/0x2734 fs/exfat/dir.c:228
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&sbi->s_lock){+.+.}-{3:3}:
__mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
exfat_get_block+0x164/0x17ec fs/exfat/inode.c:281
block_read_full_folio+0x2f4/0x98c fs/buffer.c:2271
do_mpage_readpage+0x15a0/0x1748 fs/mpage.c:304
mpage_read_folio+0xec/0x1b4 fs/mpage.c:379
exfat_read_folio+0x28/0x38 fs/exfat/inode.c:339
filemap_read_folio+0x14c/0x39c mm/filemap.c:2407
filemap_update_page mm/filemap.c:2492 [inline]
filemap_get_pages mm/filemap.c:2606 [inline]
filemap_read+0x13ec/0x2260 mm/filemap.c:2676
generic_file_read_iter+0xa0/0x450 mm/filemap.c:2822
call_read_iter include/linux/fs.h:2199 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x5bc/0x8ac fs/read_write.c:470
ksys_read+0x15c/0x26c fs/read_write.c:613
__do_sys_read fs/read_write.c:623 [inline]
__se_sys_read fs/read_write.c:621 [inline]
__arm64_sys_read+0x7c/0x90 fs/read_write.c:621
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
-> #1 (mapping.invalidate_lock#3){.+.+}-{3:3}:
down_read+0x64/0x308 kernel/locking/rwsem.c:1520
filemap_invalidate_lock_shared include/linux/fs.h:811 [inline]
filemap_fault+0x58c/0xf7c mm/filemap.c:3128
__do_fault+0x11c/0x3d8 mm/memory.c:4212
do_read_fault mm/memory.c:4563 [inline]
do_fault mm/memory.c:4692 [inline]
handle_pte_fault mm/memory.c:4964 [inline]
__handle_mm_fault mm/memory.c:5106 [inline]
handle_mm_fault+0x1f68/0x3e9c mm/memory.c:5227
faultin_page mm/gup.c:1009 [inline]
__get_user_pages+0x3b0/0x968 mm/gup.c:1233
__get_user_pages_locked mm/gup.c:1437 [inline]
get_user_pages_unlocked+0x1d0/0x770 mm/gup.c:2346
__gup_longterm_unlocked mm/gup.c:2957 [inline]
internal_get_user_pages_fast+0x1dbc/0x2234 mm/gup.c:3047
get_user_pages_fast+0x60/0x94 mm/gup.c:3139
madvise_inject_error mm/madvise.c:1113 [inline]
do_madvise+0x3a0/0x2fa8 mm/madvise.c:1417
__do_sys_madvise mm/madvise.c:1442 [inline]
__se_sys_madvise mm/madvise.c:1440 [inline]
__arm64_sys_madvise+0xa4/0xc0 mm/madvise.c:1440
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
-> #0 (&mm->mmap_lock){++++}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3098 [inline]
check_prevs_add kernel/locking/lockdep.c:3217 [inline]
validate_chain kernel/locking/lockdep.c:3832 [inline]
__lock_acquire+0x3338/0x764c kernel/locking/lockdep.c:5056
lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5669
__might_fault+0xc4/0x124 mm/memory.c:5655
filldir64+0x2d4/0x948 fs/readdir.c:335
dir_emit_dot include/linux/fs.h:3583 [inline]
dir_emit_dots include/linux/fs.h:3594 [inline]
exfat_iterate+0x23c/0x2734 fs/exfat/dir.c:231
iterate_dir+0x1f4/0x4e4
__do_sys_getdents64 fs/readdir.c:369 [inline]
__se_sys_getdents64 fs/readdir.c:354 [inline]
__arm64_sys_getdents64+0x1c4/0x4a0 fs/readdir.c:354
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
other info that might help us debug this:
Chain exists of:
&mm->mmap_lock --> mapping.invalidate_lock#3 --> &sbi->s_lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&sbi->s_lock);
lock(mapping.invalidate_lock#3);
lock(&sbi->s_lock);
lock(&mm->mmap_lock);
*** DEADLOCK ***
3 locks held by syz-executor.1/8282:
#0: ffff0001179bdc68 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xd8/0x104 fs/file.c:1047
#1: ffff00011967c3b0 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: iterate_dir+0x124/0x4e4 fs/readdir.c:57
#2: ffff0000dd7c20e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_iterate+0x144/0x2734 fs/exfat/dir.c:228
stack backtrace:
CPU: 1 PID: 8282 Comm: syz-executor.1 Not tainted 6.1.36-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call trace:
dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
dump_stack+0x1c/0x58 lib/dump_stack.c:113
print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2056
check_noncircular+0x2cc/0x378 kernel/locking/lockdep.c:2178
check_prev_add kernel/locking/lockdep.c:3098 [inline]
check_prevs_add kernel/locking/lockdep.c:3217 [inline]
validate_chain kernel/locking/lockdep.c:3832 [inline]
__lock_acquire+0x3338/0x764c kernel/locking/lockdep.c:5056
lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5669
__might_fault+0xc4/0x124 mm/memory.c:5655
filldir64+0x2d4/0x948 fs/readdir.c:335
dir_emit_dot include/linux/fs.h:3583 [inline]
dir_emit_dots include/linux/fs.h:3594 [inline]
exfat_iterate+0x23c/0x2734 fs/exfat/dir.c:231
iterate_dir+0x1f4/0x4e4
__do_sys_getdents64 fs/readdir.c:369 [inline]
__se_sys_getdents64 fs/readdir.c:354 [inline]
__arm64_sys_getdents64+0x1c4/0x4a0 fs/readdir.c:354
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581